1405-3195 1405-3195 S1405-31952017000600649 Brazil Brazil Brazil Brazil Brazil Brazil 00 09 2017 00 09 2017 51 6 649 660

2011 42 893-7 2007 151 145-54 1982 2009 31 67-74 2010 11 33-42 2003 Empresa Brasileira de Pesquisa Agropecuária 1997 2 2007 31 95-100 2011 35 1039-42 2004 55 307-19 2010 2007 64 111-8 2009 31 202-11 2009 39 1356-61 2007 2 2011 35 929-37 2010 41 358-65 1991 189-253 2000 18 314-23 2010 5 479-84 2008 67 563-8 2004 35 2067-85 2011 42 842-9 2004 103 93-9 1981 21 901-3 2007 11 482-8 2009 56 602-10 2009 4 2003 91 503-27 2004 2009 4